Eye-tracking system including a ring-shaped printed circuit board having extensions and illumination sources coupled to the extensions

A non-transitory computer-readable medium storing instructions that, when executed by a pair of smart glasses, cause the pair of smart glasses to perform:

• providing, via one or more processors of the pair of smart glasses, a first control signal to a ring-shaped printed circuit board (PCB) for illuminating a plurality of illumination sources communicatively coupled with the ring-shaped PCB via a plurality of conductive traces, wherein the ring-shaped PCB and the plurality of illumination sources are part of an optical stack coupled with a frame of the pair of smart glasses, the optical stack including:
• a first layer lens including a rigid transparent substrate for i) mechanically supporting the ring-shaped PCB and ii) controlling a perceived distance of a displayed image, the ring-shaped PCB having a plurality of extensions extending from the ring-shaped PCB,
• the plurality of illumination sources, wherein each of the plurality of illumination sources is coupled to a respective extension of the plurality of extensions of the ring-shaped PCB, and
• an optically clear adhesive (OCA) layer coupling at least a portion of the ring-shaped PCB with at least a portion of the lens;
• providing, via the one or more processors, a second control signal to one or more imaging devices for capturing image data of an eye of a user wearing the pair of smart glasses, wherein the one or more imaging devices are coupled with the frame;
• and
• determining, by the one or more processors, a gaze associated with the eye of the user wearing the pair of smart glasses based on the image data.

A method performed at a pair of smart glasses, the method comprising:

• providing, via one or more processors of the pair of smart glasses, a first control signal to a ring-shaped printed circuit board (PCB) for illuminating a plurality of illumination sources communicatively coupled with the ring-shaped PCB via a plurality of conductive traces, wherein the ring-shaped PCB and the plurality of illumination sources are part of an optical stack coupled with a frame of the pair of smart glasses, the optical stack including:
• a including a rigid transparent substrate for i) mechanically supporting the ring-shaped PCB and ii) controlling a perceived distance of a displayed image, the ring-shaped PCB having a plurality of extensions extending from the ring-shaped PCB,
• the plurality of illumination sources, wherein each of the plurality of illumination sources is coupled to a respective extension of the plurality of extensions of the ring-shaped PCB, and
• an optically clear adhesive (OCA) layer coupling at least a portion of the ring-shaped PCB with at least a portion of the lens;
• providing, via the one or more processors, a second control signal to one or more imaging devices for capturing image data of an eye of a user wearing the pair of smart glasses, wherein the one or more imaging devices are coupled with the frame;
• and
• determining, by the one or more processors, a gaze associated with the eye of the user wearing the pair of smart glasses based on the image data.